Size-based ecological interactions drive food web responses to climate warming.
Allee effects
alternative stable states
climate change
community dynamics
size structure
temperature-scaling
trophic interactions
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
May 2019
May 2019
Historique:
received:
24
10
2018
revised:
28
11
2018
accepted:
18
01
2019
pubmed:
1
3
2019
medline:
8
8
2019
entrez:
1
3
2019
Statut:
ppublish
Résumé
Predicting climate change impacts on animal communities requires knowledge of how physiological effects are mediated by ecological interactions. Food-dependent growth and within-species size variation depend on temperature and affect community dynamics through feedbacks between individual performance and population size structure. Still, we know little about how warming affects these feedbacks. Using a dynamic stage-structured biomass model with food-, size- and temperature-dependent life history processes, we analyse how temperature affects coexistence, stability and size structure in a tri-trophic food chain, and find that warming effects on community stability depend on ecological interactions. Predator biomass densities generally decline with warming - gradually or through collapses - depending on which consumer life stage predators feed on. Collapses occur when warming induces alternative stable states via Allee effects. This suggests that predator persistence in warmer climates may be lower than previously acknowledged and that effects of warming on food web stability largely depend on species interactions.
Identifiants
pubmed: 30816635
doi: 10.1111/ele.13235
pmc: PMC6849876
doi:
Types de publication
Letter
Langues
eng
Pagination
778-786Subventions
Organisme : Svenska Forskningsrådet Formas
ID : 217- 2013-1315
Organisme : Vetenskapsrådet
ID : 2015-03752
Informations de copyright
© 2019 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd.
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